Primer

They don’t travel very far along the timeline in Primer, but it’s the philosophical implications of their methodical hops through space-time that linger most. The ultra-low-budget Sundance winner, directed by engineer Shane Carruth and filmed in his parents’ garage, has gone on to become an unlikely cult hit on DVD. Two grown friends who spend their nights experimenting into the wee hours in hope of developing and selling the next hot patent accidentally build a metal chamber that is able to transport them a day into the past, where they can make surefire stock purchases to pad their portfolio. But as the friends grow cocky and sloppy — and suddenly realize there are already duplicates of them running around all over town — Primer uses its simple silver device to pry open Pandora’s box.